Thanks, that's very helpful info! On Thu, Dec 12, 2024 at 4:44 PM Even Rouault <even.roua...@spatialys.com> wrote:
> Peter, > > I was curious about something regarding the loose data files that are > built alongside proj.db: > > Nitpicking: they aren't "built", at most just present & installed. > Details below: > > > alaska ==> no longer shipped with PROJ since a long > time. Some binary distributions might still ship it as part of > nostalgia/inertia, but no longer at > https://github.com/OSGeo/PROJ/tree/master/data. It is in the proj-data as > a GeoTIFF grid now > BETA2007.gsb ==> same as above > conus ==> same as above > egm96_15.gtx ==> same as above > GL27 ==> still shipped with PROJ. Mostly/only legacy > ITRF2000 ==> still shipped with PROJ. Can be used in some > cases for advanced users creating PROJ pipelines referencing ITRF > transformations, like "+proj=pipeline ... +step +init=ITRF2000:ITRF96 ...." > MD ==> same as above about grids > nad27 ==> still shipped with PROJ. Mostly/only legacy > nad83 ==> still shipped with PROJ. Mostly/only legacy > ntf_r93.gsb ==> same as above about grids > ntv1_can.dat ==> same as above about grids > ntv2_0.gsb ==> same as above about grids > > What exactly wouldn't work if these particular files weren't available? > Are these superseded by something in the new and improved geotiffs in > proj-data? > > For the grids, yes they are all deprecated by the GeoTIFFs of proj-data > > Or would the average user not even notice they were gone? > > For the other parts, only the most enlightened minds would notice. > > Even > > -- http://www.spatialys.com > My software is free, but my time generally not. > Butcher of all kinds of standards, open or closed formats. At the end, this > is just about bytes. > > -- Peter Townsend Senior Software Developer
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